mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-07-03 00:37:23 +00:00
Sergei Pepyakin
7d8ae2df5c
* Migrate the indicies crate to 2018 edition. * Use .cloned() instead of .map(|x| x.clone()) * Update documentation.
111 lines
3.3 KiB
Rust
111 lines
3.3 KiB
Rust
// Copyright 2017-2018 Parity Technologies (UK) Ltd.
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// This file is part of Substrate.
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// Substrate is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Substrate is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Substrate. If not, see <http://www.gnu.org/licenses/>.
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//! Address type that is union of index and id for an account.
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#[cfg(feature = "std")]
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use std::fmt;
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use crate::{Member, Decode, Encode, As, Input, Output};
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/// An indices-aware address, which can be either a direct `AccountId` or
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/// an index.
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#[derive(PartialEq, Eq, Clone)]
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#[cfg_attr(feature = "std", derive(Debug, Hash))]
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pub enum Address<AccountId, AccountIndex> where
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AccountId: Member,
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AccountIndex: Member,
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{
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/// It's an account ID (pubkey).
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Id(AccountId),
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/// It's an account index.
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Index(AccountIndex),
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}
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#[cfg(feature = "std")]
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impl<AccountId, AccountIndex> fmt::Display for Address<AccountId, AccountIndex> where
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AccountId: Member,
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AccountIndex: Member,
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{
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{:?}", self)
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}
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}
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impl<AccountId, AccountIndex> From<AccountId> for Address<AccountId, AccountIndex> where
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AccountId: Member,
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AccountIndex: Member,
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{
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fn from(a: AccountId) -> Self {
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Address::Id(a)
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}
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}
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fn need_more_than<T: PartialOrd>(a: T, b: T) -> Option<T> {
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if a < b { Some(a) } else { None }
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}
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impl<AccountId, AccountIndex> Decode for Address<AccountId, AccountIndex> where
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AccountId: Member + Decode,
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AccountIndex: Member + Decode + PartialOrd<AccountIndex> + Ord + As<u32> + As<u16> + As<u8> + Copy,
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{
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fn decode<I: Input>(input: &mut I) -> Option<Self> {
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Some(match input.read_byte()? {
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x @ 0x00...0xef => Address::Index(As::sa(x)),
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0xfc => Address::Index(As::sa(need_more_than(0xef, u16::decode(input)?)?)),
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0xfd => Address::Index(As::sa(need_more_than(0xffff, u32::decode(input)?)?)),
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0xfe => Address::Index(need_more_than(As::sa(0xffffffffu32), Decode::decode(input)?)?),
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0xff => Address::Id(Decode::decode(input)?),
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_ => return None,
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})
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}
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}
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impl<AccountId, AccountIndex> Encode for Address<AccountId, AccountIndex> where
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AccountId: Member + Encode,
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AccountIndex: Member + Encode + PartialOrd<AccountIndex> + Ord + As<u32> + As<u16> + As<u8> + Copy,
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{
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fn encode_to<T: Output>(&self, dest: &mut T) {
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match *self {
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Address::Id(ref i) => {
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dest.push_byte(255);
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dest.push(i);
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}
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Address::Index(i) if i > As::sa(0xffffffffu32) => {
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dest.push_byte(254);
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dest.push(&i);
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}
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Address::Index(i) if i > As::sa(0xffffu32) => {
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dest.push_byte(253);
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dest.push(&As::<u32>::as_(i));
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}
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Address::Index(i) if i >= As::sa(0xf0u32) => {
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dest.push_byte(252);
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dest.push(&As::<u16>::as_(i));
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}
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Address::Index(i) => dest.push_byte(As::<u8>::as_(i)),
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}
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}
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}
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impl<AccountId, AccountIndex> Default for Address<AccountId, AccountIndex> where
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AccountId: Member + Default,
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AccountIndex: Member,
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{
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fn default() -> Self {
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Address::Id(Default::default())
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}
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}
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